remove some unused mut decls

src/libcore/num/num.rs

@@ -385,7 +385,7 @@ pub fn pow_with_uint<T:NumCast+One+Zero+Copy+Quot<T,T>+Mul<T,T>>(
 }
 
 #[cfg(test)]
-fn test_num<T:Num + NumCast>(ten: T, two: T) {
+pub fn test_num<T:Num + NumCast>(ten: T, two: T) {
     assert_eq!(ten.add(&two),  cast(12));
     assert_eq!(ten.sub(&two),  cast(8));
     assert_eq!(ten.mul(&two),  cast(20));

src/librustc/middle/resolve.rs

@@ -5267,7 +5267,7 @@ pub impl Resolver {
 
         debug!("Import resolutions:");
         for module_.import_resolutions.each |name, import_resolution| {
-            let mut value_repr;
+            let value_repr;
             match import_resolution.target_for_namespace(ValueNS) {
                 None => { value_repr = ~""; }
                 Some(_) => {
@@ -5276,7 +5276,7 @@ pub impl Resolver {
                 }
             }
 
-            let mut type_repr;
+            let type_repr;
             match import_resolution.target_for_namespace(TypeNS) {
                 None => { type_repr = ~""; }
                 Some(_) => {

src/librustc/middle/trans/base.rs

@@ -2366,7 +2366,7 @@ pub fn create_entry_wrapper(ccx: @CrateContext,
         // Call main.
         let lloutputarg = C_null(T_ptr(T_i8()));
         let llenvarg = unsafe { llvm::LLVMGetParam(llfdecl, 1 as c_uint) };
-        let mut args = ~[lloutputarg, llenvarg];
+        let args = ~[lloutputarg, llenvarg];
         let llresult = Call(bcx, main_llfn, args);
         Store(bcx, llresult, fcx.llretptr.get());
 

src/librustc/middle/trans/callee.rs

@@ -722,7 +722,7 @@ pub fn trans_arg_expr(bcx: block,
             }
         }
     };
-    let mut arg_datum = arg_datumblock.datum;
+    let arg_datum = arg_datumblock.datum;
     let bcx = arg_datumblock.bcx;
 
     debug!("   arg datum: %s", arg_datum.to_str(bcx.ccx()));

src/librustc/middle/trans/expr.rs

@@ -563,7 +563,6 @@ fn trans_rvalue_stmt_unadjusted(bcx: block, expr: @ast::expr) -> block {
 
 fn trans_rvalue_dps_unadjusted(bcx: block, expr: @ast::expr,
                                dest: Dest) -> block {
-    let mut bcx = bcx;
     let _icx = bcx.insn_ctxt("trans_rvalue_dps_unadjusted");
     let tcx = bcx.tcx();
 
@@ -1408,7 +1407,6 @@ fn trans_eager_binop(bcx: block,
                      lhs_datum: &Datum,
                      rhs_datum: &Datum)
                   -> DatumBlock {
-    let mut bcx = bcx;
     let _icx = bcx.insn_ctxt("trans_eager_binop");
 
     let lhs = lhs_datum.to_appropriate_llval(bcx);

src/librustc/middle/typeck/check/method.rs

@@ -120,7 +120,7 @@ pub fn lookup(
         expr: @ast::expr,                   // The expression `a.b(...)`.
         self_expr: @ast::expr,              // The expression `a`.
         callee_id: node_id,                 /* Where to store `a.b`'s type,
-                                             * also the scope of the call */ 
+                                             * also the scope of the call */
         m_name: ast::ident,                 // The ident `b`.
         self_ty: ty::t,                     // The type of `a`.
         supplied_tps: &[ty::t],             // The list of types X, Y, ... .
@@ -128,7 +128,7 @@ pub fn lookup(
         check_traits: CheckTraitsFlag,      // Whether we check traits only.
         autoderef_receiver: AutoderefReceiverFlag)
      -> Option<method_map_entry> {
-    let mut impl_dups = @mut HashSet::new();
+    let impl_dups = @mut HashSet::new();
     let lcx = LookupContext {
         fcx: fcx,
         expr: expr,

src/librustc/middle/typeck/check/mod.rs

@@ -1684,7 +1684,7 @@ pub fn check_expr_with_unifier(fcx: @mut FnCtxt,
         };
 
         // construct the function type
-        let mut fn_ty = astconv::ty_of_closure(fcx,
+        let fn_ty = astconv::ty_of_closure(fcx,
                                                fcx,
                                                sigil,
                                                purity,
@@ -1695,7 +1695,7 @@ pub fn check_expr_with_unifier(fcx: @mut FnCtxt,
                                                &opt_vec::Empty,
                                                expr.span);
 
-        let mut fty_sig;
+        let fty_sig;
         let fty = if error_happened {
             fty_sig = FnSig {
                 bound_lifetime_names: opt_vec::Empty,

src/librustc/middle/typeck/check/regionck.rs

@@ -871,7 +871,7 @@ pub mod guarantor {
         let tcx = rcx.tcx();
         debug!("guarantor::for_by_ref(expr=%s, callee_scope=%?)",
                expr.repr(tcx), callee_scope);
-        let mut expr_cat = categorize(rcx, expr);
+        let expr_cat = categorize(rcx, expr);
         debug!("guarantor::for_by_ref(expr=%?, callee_scope=%?) category=%?",
                expr.id, callee_scope, expr_cat);
         let minimum_lifetime = ty::re_scope(callee_scope);

src/test/run-fail/borrowck-wg-fail-2.rs

@@ -7,5 +7,6 @@ struct S {
 fn main() {
     let x = @mut S { x: 3 };
     let y: &S = x;
-    x.x = 5;
+    let z = x;
+    z.x = 5;
 }

src/test/run-fail/borrowck-wg-fail-3.rs

@@ -3,6 +3,7 @@
 fn main() {
     let x = @mut 3;
     let y: &mut int = x;
-    *x = 5;
+    let z = x;
+    *z = 5;
 }
 

src/test/run-fail/borrowck-wg-fail.rs

@@ -1,9 +1,7 @@
 // error-pattern:borrowed
 
-fn f(x: &int, y: @mut int) {
-    unsafe {
-        *y = 2;
-    }
+fn f(_x: &int, y: @mut int) {
+    *y = 2;
 }
 
 fn main() {